INFO: task syz-executor098:3937 blocked for more than 120 seconds.
      Not tainted 4.9.110-g00a0bcb #7
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor098 D29576  3937   3860 0x20020000
 ffff8801d4993000 ffff8801bf44d500 ffff8801d8c8df80 ffff8801d3ed9800
 ffff8801db321c18 ffff8801d428fa48 ffffffff839e6ded ffffffff812355f7
 0000000000000000 ffff8801d49938c0 0000000600000007 ffff8801db3224e8
Call Trace:
 [<ffffffff839e83ef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f3a28>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
 [<ffffffff839f3a28>] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555
 [<ffffffff81ee6607>] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 [<ffffffff839f17fc>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
 [<ffffffff839f17fc>] down_write+0x5c/0xa0 kernel/locking/rwsem.c:54
 [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
 [<ffffffff815e572d>] do_loopback fs/namespace.c:2210 [inline]
 [<ffffffff815e572d>] do_mount+0x8ad/0x2740 fs/namespace.c:2829
 [<ffffffff8168c31c>] C_SYSC_mount fs/compat.c:810 [inline]
 [<ffffffff8168c31c>] compat_SyS_mount+0x4fc/0xff0 fs/compat.c:775
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839f93d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

Showing all locks held in the system:
2 locks held by khungtaskd/519:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136662c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136662c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81425cb7>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/3777:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f5e92>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211e1e2>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133
1 lock held by sshd/3851:
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158dc67>] __pipe_lock fs/pipe.c:87 [inline]
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158dc67>] pipe_read+0xb7/0x810 fs/pipe.c:264
1 lock held by syz-executor098/3862:
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158cf06>] __pipe_lock fs/pipe.c:87 [inline]
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158cf06>] pipe_write+0xb6/0xd60 fs/pipe.c:370
1 lock held by syz-executor098/3937:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3946:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3953:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3961:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3970:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3978:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] namespace_lock fs/namespace.c:1423 [inline]
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] lock_mount+0xca/0x2c0 fs/namespace.c:2082
1 lock held by syz-executor098/3984:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3991:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor098/3997:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/4003:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4004:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4005:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4008:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/4009:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/4010:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4011:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3863:
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158cce3>] pipe_lock_nested fs/pipe.c:66 [inline]
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158cce3>] pipe_lock fs/pipe.c:74 [inline]
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158cce3>] pipe_wait+0x1a3/0x1d0 fs/pipe.c:122
1 lock held by syz-executor098/3872:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3874:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3876:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3877:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3882:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3887:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3888:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3893:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3894:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] namespace_lock fs/namespace.c:1423 [inline]
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] lock_mount+0xca/0x2c0 fs/namespace.c:2082
1 lock held by syz-executor098/3899:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3900:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3907:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3908:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3916:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3924:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3925:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3864:
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158cf06>] __pipe_lock fs/pipe.c:87 [inline]
 #0:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff8158cf06>] pipe_write+0xb6/0xd60 fs/pipe.c:370
1 lock held by syz-executor098/3913:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3920:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3928:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3936:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3944:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3950:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3960:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3968:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3983:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3988:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3989:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3990:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3995:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor098/3996:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/4000:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4001:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3901:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3909:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3917:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3927:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3934:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3942:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3949:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3959:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3969:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3976:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3977:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3980:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor098/3986:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3987:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3992:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3993:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3890:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3897:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3904:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3914:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3921:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3930:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3935:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3943:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3956:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3965:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3966:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor098/3974:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] namespace_lock fs/namespace.c:1423 [inline]
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] lock_mount+0xca/0x2c0 fs/namespace.c:2082
2 locks held by syz-executor098/3975:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3981:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3982:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] namespace_lock fs/namespace.c:1423 [inline]
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] lock_mount+0xca/0x2c0 fs/namespace.c:2082
1 lock held by syz-executor098/3878:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3881:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3885:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3891:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3898:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3905:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3911:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3919:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3931:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3938:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3939:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3940:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3947:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3948:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3957:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3958:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3883:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3889:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3895:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3903:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3910:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3918:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3926:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3932:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3945:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3951:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3952:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3954:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/3962:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3963:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3971:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3972:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3923:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3933:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3941:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3955:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3964:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3973:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3979:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/3985:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor098/3994:
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#13){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] namespace_lock fs/namespace.c:1423 [inline]
 #1:  (namespace_sem){+++++.}, at: [<ffffffff815e173a>] lock_mount+0xca/0x2c0 fs/namespace.c:2082
1 lock held by syz-executor098/3998:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/3999:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4002:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4006:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor098/4007:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815e08df>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.+.}, at: [<ffffffff815a9eca>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor098/4012:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor098/4013:
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key){++++++}, at: [<ffffffff815e16fc>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.110-g00a0bcb #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8adfd08 ffffffff81eb2329 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b9580 ffff8801d8adfd40
 ffffffff81ebd627 0000000000000001 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81eb2329>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb2329>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebd627>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebd5ba>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b9684>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81366bc4>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81366bc4>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81366bc4>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81366bc4>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d04d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f7e9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3967 Comm: syz-executor098 Not tainted 4.9.110-g00a0bcb #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d62d8000 task.stack: ffff8801d3070000
RIP: 0010:[<ffffffff8135e940>] 
c [<ffffffff8135e940>] __sanitizer_cov_trace_pc+0x0/0x50
RSP: 0018:ffff8801d3077768  EFLAGS: 00000002
RAX: ffffc90000a4e2a4 RBX: 0000000000021bcc RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffffff814a1057 RDI: dffffc0000000000
RBP: ffff8801d30778c8 R08: ffff8801d3077950 R09: 0000000000000001
R10: ffff8801d62d8000 R11: 1ffff1003ac5b127 R12: 0000000000000000
R13: 00000000000344d9 R14: 0000000000021bd0 R15: ffffc90000a4e2a0
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f75fcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000020ec000 CR3: 00000001bf779000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff814a10a6
c ffffed003ae7b8e1
c ffffffff839ed442
c 1ffff1003a60ef00
c
 ffff8801d73dc6d0
c 0000000384737588
c 0000000e010077b8
c ffff8801d73dc708
c
 ffff8801d73dc6d4
c ffff8801d3077950
c ffff8801d30777c8
c ffffffff84737580
c
Call Trace:
 [<ffffffff814a358c>] pcpu_alloc+0x2bc/0xad0 mm/percpu.c:954
 [<ffffffff814a3df4>] __alloc_percpu+0x24/0x30 mm/percpu.c:1079
 [<ffffffff815dc61a>] alloc_vfsmnt+0x12a/0x7f0 fs/namespace.c:221
 [<ffffffff815de0c4>] clone_mnt+0x74/0xb40 fs/namespace.c:1031
 [<ffffffff815e2f9f>] copy_tree+0x32f/0x810 fs/namespace.c:1793
 [<ffffffff8160f4f4>] propagate_one+0x434/0x7e0 fs/pnode.c:267
 [<ffffffff816107ea>] propagate_mnt+0x18a/0x3d0 fs/pnode.c:317
 [<ffffffff815e3ead>] attach_recursive_mnt+0x4ed/0x8f0 fs/namespace.c:2022
 [<ffffffff815e441f>] graft_tree+0x16f/0x1f0 fs/namespace.c:2122
 [<ffffffff815e6ddf>] do_loopback fs/namespace.c:2243 [inline]
 [<ffffffff815e6ddf>] do_mount+0x1f5f/0x2740 fs/namespace.c:2829
 [<ffffffff8168c31c>] C_SYSC_mount fs/compat.c:810 [inline]
 [<ffffffff8168c31c>] compat_SyS_mount+0x4fc/0xff0 fs/compat.c:775
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839f93d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: 
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c<55> 
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c